I just added some spec text to the justification section saying that within a
single prioritization level (e.g. at each space for 'inter-word', or between
each pair of adjacent characters in 'distribute' justification'), space must
be distributed equally to each expansion opportunity *in proportion to the
font-size*. So, changes in font-pitch or word-spacing/letter-spacing will not
affect how much space gets distributed to a given expansion opportunity.
I think this is correct, however, I just wanted to point out the change in
case anyone else has a concern. ^_^
~fantasai